Elk and bison are both herbivores and engage in exploitative resource competition. Which of the following could be explanations (reasonable hypotheses) as to why both species persist in Yellowstone rather than one of the two species being extirpated due to competitive exclusion.

Use the food web shown in the previous question to help with your answer.

Select all that apply:
a. Competitive exclusion does not occur for two species that share the same trophic level.
b. One of the two species has a much higher ecological efficiency than the other, making competitive exclusion less likely.
c. Their fundamental niches do not completely overlap.
d. Both species are kept well below their carrying capacities by predators.
e. Both species are K-strategists and hence unlikely to be affected by resource competition and competitive exclusion.

d. Both species are kept well below their carrying capacities by predators.

Explanation:

According to the competitive exclusion principle, two organisms in competition cannot co-exist in the long run. One of the organisms will eventually out-compete the other and the weaker organism will eventually die off due to lack of resources or relocate to another environment.

However, when both species in competition are kept well below their carrying capacities by predators or any other environmental factor, both of them can co-exist because there will be more than enough resources due to low population.

The correct option is d.

d. in sexual reproduction, offspring have more chromosomes than

either parent.

asexual reproduction results in offspring which are genetically the same as the parent organism (not counting a rare mutation). sexual reproduction produces a random mixture of the genetics derived from both parents

explanation:

answers are:

lysogenic     viral dna merges with host cell dna

lysogenic     no symptoms

lytic               viral dna takes over

lysogenic     virus does not destroy host cell

lytic               virus destroys host cell

lytic               induces symptoms of viral infection

lysogenic       cell reproduces and spreads provirus